Absolutely Pathetic! Don't Buy this cube. I had one and I lost the internals and now it's garbage. just whatever you do, DO NOT BUY THIS CUBE ANYWHERE. Just buy a Shengshou 4x4. I know this is better than the Cyclone Boys 4x4 but it's still really bad.

The cube has a horrible spring noise and when u are trying to speed solve it would pop a lot

Cube was ok out of the box, but after about 20 solves it would get constant lock ups. Then on every turn you could hear the springs and it was far from quiet. Do not buy unless you are collecting, cause this is bad

the speed is great but it’s the most catchy 4x4 I’ve ever felt. The corner cutting is like the rubiks brand which is not good.

This cube is very tight and dry out of the box but with some loob it got better but it also pops a lot THIS IS GOOD FOR BEGINNERS

I recieved this puzzle as part of the classroom set in its stickerless variant. The classroom set is meant to be a beginners puzzle set but I feel that with the quality of the rest of the puzzles recieved, this one fell short. Out of the box it was extremely crunchy and very slow. It catches and locks up a lot and when broken in it only goes away a little bit. After taking it apart to tension and lube this I couldn't put it together for a month+. The internals design is apalling and not very nice. I have it tensioned fairly tightly else it will pop, which is also a major issue. Finally, when you've broken it in, you'll notice that the inner layers either turn much faster than the outer or much slower. I havent been able to tension it so that it did have equal turning on the inner layers. The pieces are also very big looking which is a meh detail but does overall take away from the stickerless appeal. In conclusion, if you're looking to just solve this puzzle slowly, don't buy it. If you're​ looking to speedsolve, dont buy it.

As soon as I opened the box. It had a MASSIVE piece separation. So I took it out to fix it. And realized that it's so hard to reassemble. It makes the Rubiks 4x4 and shengshou 4x4 look easy.... It's pathetic.

corner cutting is not very good on any layers. Lubed with 2 drops of Silk and it turns amazing.

I've gotten 2 of these, and both exploded on me and I have a bin of 4x4 and 2x2 parts and I have the parts for both in there, as they're so hard to reassemble, the SHENGSHOU 4x4 was easier to assemble.

I bought this cube because I needed an upgrade from a ShengShou to something better. The cube is VERY locky with HORRIBLE corner cutting! The turning is sandy and fast. But if you try and turn fast the cube will lock up due to zero corner cutting! The cube came SUPER tight as well, so tight it almost felt like a Rubik's brand cube. Bad budget cube, DON'T recommend.